Last Updated on 5 months by Ollie Barker
Car lights won’t turn off? Are your car’s lights giving you trouble? This can happen to anyone, but it’s more likely in older vehicles. Because this is a problem that can be caused by a variety of things, limiting it down to just one can be challenging.
In this blog, I’ll show you various reasons why the headlights and the interior lights don’t turn off and quick fixes so you can save your battery.
Table of Contents
Car Lights won’t Turn Off: Headlights
First of all, I want to address the headlights as they are extremely important for our night driving.
Headlight Problems: What Could Be Causing Them?
Automatic lights didn’t work
Other vehicles have automated headlights that turn on dependent on the level of light outside. If that mechanism fails, your headlights may become permanently illuminated. You can try to turn them off by pressing the parking brake.
Since the parking brake ordinarily disables the automated function of the lights, this is the case. If this appears to be the case, the automatic running light system can be replaced to ensure that they switch off. Completely uninstalling the system is also a viable option.
The engine timer doesn’t work
The headlights in some cars will stay on for a specific amount of time after you turn off the motor. If you observe that your headlights are still on and you knew that your car has this system, it’s possible that this is the issue.
Upon turning off the engine, you should attempt turning off the headlights. If that solves the problem, it was most likely this.
Relay for the headlights is broken
Another reason your lights may be stuck on is because of this. When this occurs, the system sends incorrect relay information, making turning off the headlights impossible.
This system is positioned beneath your car’s hood, and it transmits to the headlights telling them how long they must wait before turning off. Lightly tapping the relay will reveal if this is the source of the problem. If the lights flickered or went out, you knew something was wrong.
Replacing the headlight relays is a simple project that will quickly solve the problem.
Only one headlight is turned on
This happens to a lot of folks, especially if you have a recent vehicle. This is due to the fact that defective automated lights can also cause this issue.
When the lights become out of sync, just one of them will remain on after the shutoff period. You may test this theory by using the parking brake again; if they cut off when you’re using it, then this was the issue.
It could, however, be the result of anything as easy as one of your headlights failing. Before you go to a professional to have this problem fixed, make sure your bulb has to be replaced.
How to Stop Your Headlights from Draining Your Battery
There are two ways to protect the headlights from draining the battery if you don’t have time to fix the problem immediately away or if you wish to take the car for a while without the battery dying.
Method 1: Remove the battery
Disconnecting your car battery is the simplest technique to keep it from dying. This entails physically detaching one of the battery cables from the battery, which necessitates the use of a wrench or socket of the proper size.
To prevent generating a short circuit, detach the negative cable rather than the positive cable if you’ve never unplugged a battery before.
Negative cables are usually black, while positive cables are usually red. A – symbol, which will be will be at the negative terminal, and a + symbol, which means the positive terminal, can also be found on the battery.
Move the negative battery cable away from the battery after detaching it to avoid it being nudged or bumped and coming back into touch with the negative battery terminal.
The headlights will go off and the battery will not drain once the battery is detached.
Method 2: To turn off the headlights, remove the fuse or relay
The proper fuse or relay can also be removed to turn off the headlights. Because you must first identify the relevant fuse panel and then determine what fuse or relay to remove, this is more difficult than simply removing the battery. However, this will prevent the computer and radio from losing power, so you won’t be dealing with any consequences afterward.
If your headlights won’t switch off due to a defective headlight relay, the solution is to replace the relay. Because there’s a chance that numerous circuits use the same sort of relay, it’s a little easier to check.
If you can locate another relay in your automobile with the same model number as the headlight relay, you can take it, replace it with an exact one from a different circuit, and test whether the headlights turn off normally. If the headlights go out, you’ll need to replace the relay.
If Your Car’s Interior Lights Won’t Turn Off
Your car’s interior lights are designed to work both manually and automatically when you open and close the doors, using the various hand switches on the roof next to the light, on the doors, and on the dashboard.
Interior Car Lights Problems: What Could Be Causing Them?
There may be some malfunctioning where the lights stay on rather than turning off as they should. If you’re having this problem, it’s most likely due to one of the following factors.
Failure to properly close the door
The interior lights of your automobile are connected to the vehicle’s door and, in certain cases, the trunk. As you open the doors or trunk, the lights turn on, and when you close them, they turn off.
As a result, if your car’s interior lights refuse to turn off at any point, the problem is most likely due to one or more doors you neglected to close properly.
Switch that has been damaged or is defective
The lights are controlled by a manual switch located near the light on the roof, on the dashboard, and on the door. It’s possible that the inside lights won’t turn off because you forgot to turn off a switch you previously set on.
If this is not the case, one or more of the switches has most certainly been destroyed, especially if the functionality has been left on.
Adjust the dimmer switch to the highest setting
The dimming of your car’s lights is controlled by a setting on the dashboard on the left side of the steering wheel. The interior lights of your car are frequently affected once the setting is changed to the farthest position.
If your car’s interior lights are on and won’t turn off after you’ve checked all of the other control points, alter the dimmer switch setting.
What to Do If Your Car’s Interior Lights Won’t Turn Off
If your car’s interior lights won’t turn off, try the following solutions to remedy the problem.
Make the necessary changes to the light switch
For starters, it’s all too simple to turn on the lights on the dashboard or on the roof of your car and then forget to turn them off.
As a result, the first step is to see if you accidentally forgot to turn it off after manually turning it on. If this is the case, switch it off.
Check the light switches at the doorways for proper operation
The doors or the trunk, are another point of control for your vehicle’s interior lights. As a result, you should do a thorough examination of the door switches.
To see if the light turns off, you will have to open and close every one of the doors, one by one. If it doesn’t work, look for the manual light switch on each door and click it to turn it off.
When you press the switch, you will hear a click. If you don’t hear a click or the light doesn’t turn off after this, the door’s switch is probably broken. Attempt to repair the faulty switch yourself or get professional assistance.
Check the headlight switch for proper operation
On the dashboard of some cars, there is a knob that controls the brightness of the lights. If this light is set to the highest setting, it may interfere with the interior light and prevent it from turning off. As a result, if the setting is set to the highest level, adjust it to solve the problem.
These are some of the most likely causes why your car’s lights don’t turn off. Once you’ve found the problem, a mechanic or you, if you know what you’re doing, can easily fix it.
Make sure your battery doesn’t get too low, as this can prevent your car from igniting when you need it.
Hi, My name is Ollie Barker.
With 25 years working in repair and detailing shops. I’d love to share my tips & tricks to all car lovers. Also, give my recommendations on which products are the best to have on the market.
Thanks for visiting CarDetailingArt! Hope you enjoy your time on my little blog!